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Take two cups of coffee to get half risk of suicide

By Eko Armunanto     Jul 28, 2013 in Science
A recent study indicates people drank more than four cups of coffee daily had over a 50 percent lower chance of taking their own lives than those who drank less than one cup. Caffeine increases neurotransmitters like serotonin, dopamine and noradrenalin.
Suicide risk in this study refers to those people who actually completed suicide; the researchers did not measure actual suicide risk as commonly referred to by other researchers, which would include those who attempted suicide but failed.
Not only does caffeine stimulate the central nervous system, but it may act as a mild antidepressant by boosting production of certain neurotransmitters in the brain, including serotonin, dopamine and noradrenaline. This could explain the lower depression risk among coffee drinkers found in past epidemiological studies, the researchers reported in The World Journal of Biological Psychiatry July, 2013. They evaluated the association between coffee and caffeine consumption and suicide risk in three large-scale cohorts of US men and women and found an association between caffeine consumption and lower risk of suicide.
They are not recommending, however, that depressed adults increase their caffeine consumption, because most people adjust their caffeine intake to a level that feels right for them, and an increase could result in unpleasant side effects.
The Harvard researchers believe that the caffeine in coffee can increase neurotransmitters like serotonin, dopamine and noradrenalin. This can boost a person's mood and act as a mild antidepressant, given the drugs target these neurotransmitters. Michel Lucas, a research fellow in the department of nutrition at Harvard School of Public Health, said his team was able to assess association of consumption of caffeinated and non-caffeinated beverages, and to identify caffeine as the most likely candidate of any putative protective effect of coffee.
Beside this study, there were also findings to suggest that this is not the only good thing coffee can do for people. CBS News reported a March study showing that those who drank at least one cup of coffee or green tea a day had a 20 percent lower stroke risk than those who rarely drank the beverage. Another research reported by CBS said heavy coffee drinking, those who drink four or more cups a day, was associated with a 50 percent lower chance of dying from oral and pharyngeal cancers compared to those who didn't consume the drink.
The Medical News Today said the recommended coffee intake for the average healthy adult is around 2-4 cups per day; and that too much caffeine can have unpleasant side effects, such as insomnia, nervousness, restlessness, muscle tremors and a fast heartbeat.
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